Spool Box V2

Hi! This is my spool box version. 

Check the model here: https://a360.co/4lYvhBH

It is easier to insert the bearings. I added a connector tube fitting for M6 and different top covers, depending on which one you like more. 
I used colorFabb Varioshore TPU for the seal parts. 

There are 3 different types of top parts, print the best for you. 
BOM: 

4 x Ball Bearing Shielded, Trade No. 688-2Z, for 8 mm Shaft Diameter
13 x Hex Nut Medium-Strength, Class 8, M3 x 0.5 mm Thread 
2 x Socket Head Screw M3 x 0.5 mm Thread, 40 mm Long 
10 x Socket Head Screw Black-Oxide, M3 x 0.5 mm Thread, 50 mm Long 
1 x Socket Head Screw Black-Oxide, M3 x 0.5 mm Thread, 30 mm Long
2 x M10 Pneumatic Fitting 
4 x 10 mm x 3 mm Round Silicone Anti slip shock pads


Assembly instructions: